Hexagonifera? laticaudata Vozzhennikova, 1967

Now Leberidocysta?. Originally Hexagonifera, subsequently Hexagonifera?, thirdly (and now) Leberidocysta?. Lentin and Williams, 1976, questionably retained this species in Hexagonifera.
Stover and Evitt, 1978, questionably transferred the species to Leberidocysta Stover and Evitt 1978.
Mehrotra and Sarjeant, 1984, retained the species in Hexagonifera?, but Lentin and Williams, 1985, agreed with Stover and Evitt, 1978.

Holotype: Vozzhennikova, 1967, pl.54, fig.1; Lentin and Vozzhennikova, 1990, text-fig.30 (lost according to Lentin and Vozzhennikova, 1990
Lectotype: none available, according to Lentin and Vozzhennikova, 1990
Stratum typicum: Santonian
Translation Vozzhennikova, 1967: Lentin and Vozzhennikova, 1990

Original description: Vozzhennikova, 1967, p.125
Internal body oval, thick walled, the surface with coarsely tuberculate sculpturing. Theca discernible at the apical end in the form of a small conical, broadly rounded outgrowth and at the antapical end by a broad, hyaline, caudal process, truncated at the tip.